diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6e1d2d19..7dd45b9d 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -33,7 +33,7 @@ jobs:
         oscar-version:
           - 'stable'
           - 'devel'
-          - '1.0'
+          - '1.1'
         os:
           - ubuntu-latest
         #include:
@@ -60,12 +60,12 @@ jobs:
             using Pkg
             Pkg.develop("Oscar")
             Pkg.pin("Oscar")'
-      - name: "Install OSCAR 1.0"
-        if: ${{ matrix.oscar-version == '1.0' }}
+      - name: "Install OSCAR 1.1"
+        if: ${{ matrix.oscar-version == '1.1' }}
         run: |
           julia --project=@. --color=yes --code-coverage -e '
             using Pkg
-            Pkg.add(name="Oscar", version="1.0")
+            Pkg.add(name="Oscar", version="1.1")
             Pkg.pin("Oscar")'
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
diff --git a/Project.toml b/Project.toml
index 5f283b70..6d8ce5d7 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "GenericCharacterTables"
 uuid = "fdcc7804-6c20-4e83-8118-baad6b7d05b7"
 authors = ["Andreas Leim <leim@rhrk.uni-kl.de>", "Martin Wagner <marwagne@rhrk.uni-kl.de>", "Max Horn <mhorn@rptu.de>"]
-version = "0.4.2"
+version = "0.5.0-DEV"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
@@ -11,5 +11,5 @@ Oscar = "f1435218-dba5-11e9-1e4d-f1a5fab5fc13"
 [compat]
 Compat = "4.11"
 JSON = "^0.20, ^0.21"
-Oscar = "0.14, 1.0"
+Oscar = "1.1"
 julia = "1.6"
diff --git a/src/GenericCyclotomics.jl b/src/GenericCyclotomics.jl
index f1abd68d..e4e62e96 100644
--- a/src/GenericCyclotomics.jl
+++ b/src/GenericCyclotomics.jl
@@ -2,42 +2,14 @@ if pkgversion(Oscar.AbstractAlgebra) >= v"0.42.0"
 	const ZZUPoly = Generic.UnivPoly{ZZRingElem}
 	const UPoly = Generic.UnivPoly{QQFieldElem}
 	const UPolyRing = Generic.UniversalPolyRing{QQFieldElem}
-	const univ_poly_change_base_ring = change_base_ring
 else
 	const ZZUPoly = Generic.UnivPoly{ZZRingElem, Generic.MPoly{ZZRingElem}}
 	const UPoly = Generic.UnivPoly{QQFieldElem, Generic.MPoly{QQFieldElem}}
 	const UPolyRing = Generic.UniversalPolyRing{QQFieldElem, Generic.MPoly{QQFieldElem}}
-
-	function Oscar.AbstractAlgebra.evaluate(f::FracElem{T}, vars::Vector{Int}, vals::Vector{U}) where {T <: RingElement, U <: RingElement}
-		 return evaluate(numerator(f), vars, vals)//evaluate(denominator(f), vars, vals)
-	end
-
-	function Oscar.AbstractAlgebra.check_parent(a, b, throw::Bool = true)
-	   flag = parent(a) === parent(b)
-	   flag || !throw || error("parents do not match")
-	   return flag
-	end
-
-	# for compat with Oscar 1.0: workaround for broken change_base_ring (this
-	# was fixed in a subsequent AA release)
-	function univ_poly_change_base_ring(R, f; cached::Bool=true)
-		Rx = parent(f)
-		P = Generic.MPolyRing{elem_type(R)}(R, symbols(Rx), internal_ordering(Rx), cached)
-		S = universal_polynomial_ring(R; internal_ordering=internal_ordering(Rx), cached)
-		S.S = deepcopy(symbols(Rx))
-		S.mpoly_ring = P
-		return change_base_ring(R, f, parent=S)
-	end
 end
 const UPolyFrac = Generic.FracFieldElem{UPoly}
 const UPolyFracRing = Generic.FracField{UPoly}
 
-if isdefined(Oscar,:is_terse)  # for compat with Oscar 1.0
-	import Oscar: is_terse
-else
-	is_terse(io::IO) = get(io, :supercompact, false)::Bool
-end
-
 @doc raw"""
     kempner_with_data(m::Int64)
 
@@ -485,7 +457,7 @@ function (R::GenericCycloRing)(f::Dict{UPolyFrac, UPoly}; simplify::Bool=true)
 	fp=Dict{UPolyFrac, UPoly}()
 	for (c,g_2,r,a) in L
 		# normalize the polynomial part of the exponent
-		ap=normal_form(univ_poly_change_base_ring(ZZ,d*a), d)
+		ap=normal_form(change_base_ring(ZZ,d*a), d)
 
 		# normalize the constant part
 		t=constant_coefficient(ap)
diff --git a/src/Imports.jl b/src/Imports.jl
index 9afe9714..d8427166 100644
--- a/src/Imports.jl
+++ b/src/Imports.jl
@@ -52,6 +52,7 @@ import Oscar:
 	is_domain_type,
 	isequal,
 	is_exact_type,
+	is_terse,
 	is_unit,
 	mul!,
 	norm,